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DERIVATIVES - SCHEDULE PRE-TAX GAINS (LOSSES) RECOGNIZED IN NET INCOME FOR DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | $ 161.1 | $ 81.1 | $ 95.9 | $ 11.7
Net pre-tax impact | 45.0 | 21.4 | 6.8 | (35.1)
Embedded derivatives |  |  |  |
Derivative [Line Items] |  |  |  |
Embedded derivatives related to fixed indexed annuities | 0.5 | 0.8 | 3.4 | (7.2)
Embedded derivatives | Embedded derivatives related to fixed indexed annuities |  |  |  |
Derivative [Line Items] |  |  |  |
Embedded derivatives related to fixed indexed annuities | 116.1 | 59.7 | 89.1 | 46.8
Income Statement Location [Axis]: us-gaap:GainLossOnInvestments | Embedded derivatives | Embedded derivative related to modified coinsurance agreement |  |  |  |
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | (0.2) | 0.1 | (0.6) | 1.3
Income Statement Location [Axis]: us-gaap:InvestmentIncomeInvestmentExpense | Fixed indexed call options |  |  |  |
Derivative [Line Items] |  |  |  |
Gains on derivatives not designated as hedging instruments | $ 161.3 | $ 81.0 | $ 96.5 | $ 10.4

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